jpeterson
Premium
join:2007-10-13
Chicago, IL
| [Config] Fun with Cisco 1720 WIC-1ADSL, WIC-1ENET and Cisco PIX
I'm a (Covad) Speakeasy ADSL customer and I wish to use my Cisco 1720 router on the circuit. I have four static IPs provided by SpeakEasy. Below is the general topology I'm wanting to achieve.
SLAN = Extended work LAN via PIX VPN w/laptop and VOIP phone.
WRT54GS = Linksys router for internet and wifi.
SERVER = Internet facing (public IP) web/mail/ftp server.
That's basically it, I'm just not sure how to accomplish the following points:
* ADSL config..
Speakeasy says they don't officially support using anything but their DSL adapter, so they won't help beyond giving me the following info about my circuit:
Line Encoding: G.DMT
Data Mode: RFC1483 Bridged
VPI: 0
VCI: 35
ATM Service Type: UBR
PCR (Peak Cell Rate): 2500
Encapsulation Type: LLC/SNAP
* IP bridging..
Basically I don't think the Cisco will get one of the public IP addresses, or will it? as I understand they aren't actually routed to me so I won't be using my router as a gateway or anything like I would have when I had an ADSL with an actual routed block.
Any assistance would be fantastic! I did see a few posts from a long time ago but they weren't incredibly helpful as there didn't seem to be a "this finally worked" closing to either of them.
Thanks! |
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TomS_
debugger it
Premium,MVM
join:2002-07-19
Australia
| Re: [Config] Fun with Cisco 1720 WIC-1ADSL, WIC-1ENET and Cisco
The following forum FAQ outlines what is required to configure a bridged connection.
You may need to statically assign the IP address to your router if it isnt assigned via DHCP, in which case simple enter "ip address x.x.x.x y.y.y.y" in the BVI interface.
»Cisco Forum FAQ »Configure router with integrated ADSL modem as DHCP client
If you run into any difficulties, post a copy of your config (minus passwords) and we'll see what we can do to help you out. |
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tildeleb
Premium
join:2004-06-22
Sunnyvale, CA
| reply to jpeterson
I have a 3620 with a WIC-1ADSL working with SE. It should be no problem.
Q. How many IP addresses do you have. Are they contiguous?
You have to think about how you carve up the address space. I have a /29 and I assign the first address to the router and the second address is used for NAT. I use other pairs of addresses for point to point links from an NM-4E. There are probably better ways to do this. I should trunk to my switch, but I digress.
Try something like:
to get started.
--
~leb |
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jpeterson
Premium
join:2007-10-13
Chicago, IL | Thanks for the responses, I will try these things later today. I have four sequential IP addresses.
Oh and I had another thought,
1720 -> ETH0 -> PIX/Router/Public network
1720 -> ETH1 -> Local NAT -> Linksys WAP |
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ieee1394
Premium
join:2001-08-25
Washington | reply to jpeterson
Around here, Covad is using ADSL2. I don't believe the WIC-1ADSL card will work with ADSL2. For that you need the HWIC-1ADSL. Unless someone can enlighten us with some practical experience on using the ADSL2/WIC-1ADSL combination... |
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godric
@co.uk | reply to jpeterson
Look for Routed Bridged Encapsulation (RBE) in the Cisco documentation. It shows a couple of different ways of setting this up (using BVI or using atm route-bridged ip). |
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jpeterson
Premium
join:2007-10-13
Chicago, IL
| reply to jpeterson
Okay, let's start out simple. Assume I only have one IP address I'm going to use, and that I am going to NAT everything at the 1720. I am able to get show int ATM0 to give me
ATM0 is up, line protocol is up
but I'm unable to pass traffic.
here is what I have:
interface ATM0
description Interface to Speakeasy DSL
ip address x.x.x.x 255.255.255.0
ip nat outside
no atm ilmi-keepalive
dsl operating-mode auto
dsl enable-training-log
no fair-queue
hold-queue 208 in
!
ip route 0.0.0.0 0.0.0.0 x.x.x.1
end
Speakeasy provided me with the following when I asked them for help:
Line Encoding: G.DMT
Data Mode: RFC1483 Bridged
VPI: 0
VCI: 35
ATM Service Type: UBR
PCR (Peak Cell Rate): 2500
Encapsulation Type: LLC/SNAP |
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